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Port 13 Details
known port assignments
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 13 |
tcp,udp |
Daytime |
Daytime service [RFC 867] - responds with the current time of day. Different machines respond with slightly different date/time format, so port can be used to fingerprint machines. |
SG |
| 13 |
tcp,udp |
|
DAYTIME - (RFC 867) (official) |
Wikipedia |
| 13 |
tcp,udp |
daytime |
Daytime (RFC 867) |
IANA |
| 13 |
tcp,udp |
daytime |
daytime |
Nmap |
4 records found
« back to SG Ports
External Resources
SANS Internet Storm Center: port 13
tantalo.net port assignments: port 13
GRC: port 13
Notes:
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol. TCP is one of the main protocols in
TCP/IP networks. Whereas the IP protocol deals only with packets, TCP enables two hosts
to establish a connection and exchange streams of data. TCP guarantees delivery of data
and that packets will be delivered in the same order in which they were sent.
Guaranteed communication is the key difference between TCP and UDP.
UDP ports use the Datagram Protocol, a communications protocol for the Internet network,
transport, and session layers. Like TCP (Transmission Control Protocol),
UDP is used with IP (the Internet Protocol) and makes possible the transmission of datagrams
from one computer to applications on another computer, but unlike TCP, UDP is connectionless
and does not guarantee reliable communication; it's up to the application that received
the message to process any errors and verify correct delivery.
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